EP0125447B1 - Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup - Google Patents
Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup Download PDFInfo
- Publication number
- EP0125447B1 EP0125447B1 EP84103489A EP84103489A EP0125447B1 EP 0125447 B1 EP0125447 B1 EP 0125447B1 EP 84103489 A EP84103489 A EP 84103489A EP 84103489 A EP84103489 A EP 84103489A EP 0125447 B1 EP0125447 B1 EP 0125447B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- pressure
- source
- oxygen
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/14—Respiratory apparatus for high-altitude aircraft
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1842—Ambient condition change responsive
- Y10T137/1939—Atmospheric
- Y10T137/2012—Pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2564—Plural inflows
- Y10T137/2567—Alternate or successive inflows
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7793—With opening bias [e.g., pressure regulator]
- Y10T137/7809—Reactor surface separated by apertured partition
- Y10T137/781—In valve stem
- Y10T137/7811—Also through reactor surface
Description
- High altitude aircraft require oxygen enriched air either as emergency backup in the event of loss of cabin pressure as in commercial transports or as an on-line system which controls oxygen enrichment as a function of altitude and other parameters as in military aircraft. Oxygen enrichment can be achieved using oxygen sources such as stored liquid oxygen, high pressure oxygen gas, oxygen generators, sometimes referred to as candles, or fractionalized air. Except in the case of fractionalizing air, the oxygen source represents a discrete quantity limited by storage capacity and/ orweightwhich can be critical in airborne applications. Air fractionalizing is a continuous process, and, thus, represents advantages where capacity, supply logistics, or weight are problems.
- Air fractionalizing is normally accomplished by alternating the flow of high pressure air through each of two beds containing a molecular sieve material such as zeolite. This process is identified as the pressure swing adsorption technique and it employs a myriad components, mechanical, electrical and pneumatic. Though highly reliable, the number of components making up a pressure swing system suggests the probability of an intermittent failure. In high altitude military aircraft, where a single such failure could be catastrophic, it is very desirable to maintain a backup system usually comprised of high pressure oxygen bottles see, for example, EP-A-0 045 404. This high pressure gas can also be used at very high altitudes to achieve oxygen concentrations above those attainable by pressure swing adsorption systems due to the trace gases such as argon which are not adsorbed and exit the adsorption system as part of the product gas.
- In an aircraft using an air fractionalizing oxygen enriching system with high pressure bottled oxygen backup, various modes of operation of the two systems in combination are possible. These modes include operation from the bottled gas, from the fractionalized air, or an automatic mode in which either of thetwo sources is selected based on altitude, oxygen concentration in the breathing system and/or breathing system pressure.
- According to the invention, a selector valve for a high altitude aircraft on-board oxygen generating system (OBOGS) with high pressure bottled oxygen backup is used to combine the various mechanical, electrical, and pneumatic elements of this breathing system to best suit the flight regime of the aicraft at any particular time.
- It is therefore an object of this invention to provide an aircraft breathing system utilizing an air fractionalizing primary source of oxygen enriched product gas and bottled high pressure oxygen as a back-up source for emergency oxygen, as well as higher oxygen concentration product gas.
- It is also an object of the invention to provide a selector valve for combining the various mechanical, electrical, and pneumatic elements of the breathing sytem to adapt its mode of operation to the aircraft flight parameters and the pilot needs.
- It is still a further object of the invention to provide a selector valve which will automatically select the backup oxygen source if the oxygen partial pressure (PP02) or the OBOGS system pressure falls below a predetermined level in the breathing system.
- It is yet another object of the invention to provide a selector valve which will automatically select OBOGS gas upon depletion of the backup oxygen below a predetermined pressure.
-
- Figure 1 is a schematic representation of a selector valve for an aircraft oxygen enriched breathing system employing both airfractionaliza- tion and bottled gas as oxygen sources.
- Figure 2 is an electrical schematic for energizing the control valve coil and powering system performance indicator lamps.
- A
selector valve 10, as illustrated in Figure 1, for use in an aircraft breathing system wherein oxygen enrichment is provided by two sources, fractionalized air and backup bottled gas includes acontrol valve 12 and ashuttle valve 70. Thecontrol valve 12 has three pneumatic ports, aninlet port 14 through which the product gas of the air fractionalizing on-board oxygen generating system (OBOGS) flows, a bottledgas inlet port 16, and a regulatedpressure outlet 18 for the backup bottled gas. The OBOGS gas entering theport 14 passes through aflow restrictor 20 to theinlet port 22 of a normally closedsolenoid valve 24 and to the first face 26 of apiston 28. Thepiston 28 has anintegral stem 30 with a roll pin 32 rigidly secured at one end perpendicular to the axis of the stem. The roll pin 32 is guided in slots 34 in thehousing 13 preventing thestem 30 from rotating while allowing it to move axially. Axial motion of thestem 30 occurs as thescrew cam 36 rotates with itscam surfaces 38 engaging the roll pin 32. The roll pin 32 is held in engagement with thecam surfaces 38 by the bias of acompression spring 66. - The axial travel of the roll pin 32 simultaneously actuates two
microswitches screw cam 36 rotates so as to allow the roll pin 32 to move in the opposite direction (to the left), a crest of one of the screw cam lobes engages thestem 42 of adump valve 44 opening it against the bias of acompression spring 46. - A biasing
spring 47 acts on the first face 26 to effectively lower the OBOGS gas pressure downstream of theflow restrictor 20 at which thepiston 28 is displaced. - On the
second face 52 of thepiston 28, there is mounted a sealed bellows 54. The bellows end opposite thepiston 28 is sealed by an end plate 56 integral with apoppet 58. Thepoppet 58 is sealed as it passes through thehousing 13 into a closed chamber 60 allowing it to modulate or restrict the flow of backup oxygen from theinlet port 16 to theexit port 18 as thepoppet 58 constricts or stops the flow through anarea 62. - The bellows 54 is biased in a first direction by a compression spring 64 and in a second direction by the
compression spring 66, which also biases thepiston 28, itsstem 30 and the roll pin 32. - The normally closed
solenoid 24 is biased in the closed position by acompression spring 68 and is opened against the compression load of that spring when thecoils 69 are electrically excited. - The
shuttle valve 70 also has three ports, aninlet port 72 through which the OBOGS gas enters, a backupoxygen inlet port 74 which is connected to the pressure regulatedoutlet port 18 of thecontrol valve 12, and adischarge port 76 which is connected to a breathing mask regulator (not shown) which breathing mask furnishes the oxygen enriched gas to the pilot. Gas flow through theshuttle valve 70 is controlled by apiston 78 alternatively seating and closing or unseating and openinginlets chamber 84 which communicates with thedischarge port 76. Thepiston 78 is connected to asecond piston 86 which is biased by aspring 88. Thepiston 86 is responsive to the backup oxygen pressure at theport 74 acting against thespring 88 bias. - The
selector valve 10 is an electro-mechanical/ pneumatic device. The electrical control circuit focuses primarily on energizing thecoils 69 of thesolenoid valve 24. Figure 2 schematically represents the electrical circuitry. Themicroswitches contacts 90 are simultaneously opened or closed by anoxygen monitor 92 which senses the partial pressure of the oxygen (PPO,) in the breathing system at the inlet to the mask (not shown) and closes thecontacts 90 when the PP02 is below a predetermined minimum level. Ananeroid device 94 responsive to cabin pressure closes a set ofcontacts 96 below a pressure equivalent to an altitude of 25,000 feet (7,600 m). Acaution light 100 gives indication of a low PP02 level. Acaution light 102 gives indication that thecontrol stem 30 has moved to the ON position. Microswitch 48 controls the OBOGS bleedflow controller 104. - The
selector valve 10 is used in an aircraft breathing system which has an on-board oxygen generating system (OBOGS) with a backup oxygen system (BOS), both used to provide oxygen enriched gas to the pilot. The selector valve employs the OBOGS or the BOS manually, as determined by the pilot, or automatically to suit the pilot, systems and/or flight conditions. Theselector valve 10 has three (3) operating modes, BOS OFF, OBOGS, and BOS ON. The modes are selected by rotatively positioning thescrew cam 36 by means of aselector knob 37 attached to its stem. - Referring to the Figures, in the "BOS OFF" position, the
screw cam 36 drives the roll pin 32 into the valve (which motion in the exemplary illustration is to the right) displacing thestem 30 and itspiston element 28, the end plate 56 and thepoppet 58 seating the poppet and closing thearea 62. At the same time the roll pin 32 trips thelever 40 simultaneously actuating themicroswitches switch 48 and opening theswitch 50. In this "BOS OFF" position, theselector valve 10 has restricted the BOS completely causing the OBOGS to function as though no BOS gas were available. Theaneroid 94 will close thecontacts 96 when the cabin pressure reaches an equivalent of an altitude of 25,000 feet (7600m). Though thecoil 69 is energized by thecontacts 96 closing, and thesolenoid 24 will open, there is no effect on the selector valve since thepoppet 58 is held in its seat mechanically as will be more fully understood later. It should be noted that the "BOS OFF" position of the selector valve is not considered normal for flight conditions. This position provides a positive closure of the BOS to prevent inadvertent leakage when the aircraft is not in service. - In the "OBOGS" position of the
selector knob 37, themicroswitch 48 remains closed and themicroswitch 50 remains open. Thescrew cam 36 allows the roll pin 32 to move to the left along with thestem 30 and itspiston element 28, the end plate 56 and thepoppet 58, all motivated by thecompression spring 66, until the face 26 of thepiston 28 contacts aland 51 of thehousing 13 restricting further travel. OBOGS gas passes therestrictor 20 pressurizing the first face 26 of thepiston 28 causing the piston to move, assisted by the biasingspring 47, against the bias of thecompression spring 66 moving the end plate 56 and thepoppet 58 seating the poppet and closing thearea 62.Area 62 will be open below a preset OBOGS pressure. When theaneroid device 94 closes thecontacts 96 at 25,000 feet (7600 m) cabin altitude and/or when theoxygen monitor 92 senses low PP02 closing thecontacts 90, thecoil 69 is energized, thesolenoid 24 opens and the OBOGS gas pressure downstream of the restrictor 20 decays as the gas bleeds through theinlet 22 to a chamber 105 which is vented to the atmosphere. The pressure decay allows thepiston 28 to be returned by thecompression spring 66 to the point where it contacts theland 51, retracting thepoppet 58 and opening thearea 62. As thepoppet 58 unseats, the pressure in the chamber 60 rises as the high pressure backup oxygen enters theinlet 16. The pressure in the chamber 60 also internally pressurizes the bellows 54 as the oxygen passes through the passage 106 in thepoppet 58 expanding the bellows 54 against thespring 66 and constricting thearea 62. The dynamics of the bellows operating on thearea 62 are those of a conventional pressure regulator. If the pressure at theinlet 16 is high, this pressure will expand the bellows, restrict thearea 62 and introduce a pressure drop at thearea 62 which will reduce the pressure exiting at theport 18. If the inlet pressure at theport 16 decreases due to the depletion of the oxygen bottle or otherwise, the bellows will contract, opening thearea 62, decreasing the pressure drop at the area and thereby maintaining a constant pressure at theport 18 until the inlet pressure falls below the regulated pressure level. - Summarizing the "OBOGS" position of the selectorvalve, the
microswitch 48 is closed and themicroswitch 50 remains open and under 25,000 feet (7600 m) altitude, thesolenoid valve 24 is closed. The OBOGS gas pressure acting on thepiston 28 seats thepoppet 58 closing thearea 62. OBOGS gas is directed to the pilot. Over 25,000 feet (7600 m) cabin altitude, theaneroid device 94 closes thecontacts 96, energizing thecoil 69 and opening thesolenoid valve 24. Thecoil 69 will also be energized opening thevalve 24, when theoxygen monitor 92 senses low PP02 and closes thecontacts 90. When thevalve 24 opens, OBOGS gas pressure decays as the gas bleeds off to the atmosphere and allows thepiston 28 to return thereby allowing thepoppet 58 to unseat and permit the bellows 54 to act on thepoppet 58 and allow pressure regulated flow of backup oxygen past theexit port 18. - The third position, BOS ON, of the
selector valve 10 closes themicroswitch 50 and opens themicroswitch 48 as the roll pin moves further to the left and disengages thetrip lever 40. Thescrew cam 36 rotates so as to engage thedump valve 44 at itsstem 42 with the crest of one of the screw cam lobes thereby opening the dump valve and venting to atmosphere the OBOGS gas downstream of theflow restrictor 20 causing the pressure acting on the face 26 of thepiston 28 to decay. As the pressure decays, thepiston 28 returns by the urging of thespring 66 to the position where it contacts theland 51. BOS gas is provided to the pilot. The closing of themicroswitch 50 powers thelamp 102 indicating that the BOS is on. - The
shuttle valve 70 is responsive to the OBOGS and BOS gas pressures. The pressure regulated BOS gas, which exits theport 18, enters theshuttle valve 70 at theport 74. Likewise, the OBOGS gas which enters thecontrol valve 12 at theinlet 14 also enters theshuttle valve 70 at theinlet port 72. Thepiston 78 alternatively seats and closes and unseats and opens theinlets chamber 84. OBOGS gas pressure acting on thepiston 78 assisted by the bias of thespring 88 will seat the piston at theinlet 82 closing that inlet and directing the OBOGS gas from theinlet 72 to thechamber 84 and to thedischarge port 76 which is connected to the breathing mask regulator (not shown) which breathing mask furnishes the oxygen enriched gas to the pilot. When, under the various conditions described above, the BOS gas is available at theoutlet port 18, its pressure at theinlet 74 will act on thepiston 86 opening theinlet 82 and seating thepiston 78atthe inlet 80 blocking OBOGS gas flow and permitting BOS gas flow from the inlet74through thechamber 84iniet 82 to thedischarge port 76 to the pilot. - Typically, the pressure levels to which the
shuttle valve 70 could be responsive are an OBOGS pressure of 35 psig (2,45 kg/cm2 above atmospheric pressure (aap) which will open theinlet port 80 in cooperation with thespring 88. A regulated BOS gas pressure of 45 psig (3,15 kg/cm2 aap) will shuttle thepiston 78 to close theport 80 and open theport 82 aqainst the bias of thespring 88. Due to the area difference of thepistons piston 78 at 45 psig (3,15 kg/cm2 aap), the valve will hold this position to BOS gas pressures at low as 20 psig (1,40 kg/cm2 aap). When the BOS gas pressure falls below 20 psig (1,40 kg/cm2 aap) due to depletion or shutoff, the OBOGS product gas pressure will shuttle the valve and OBOGS gaswill befurnished to the pilot.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US484964 | 1983-04-14 | ||
US06/484,964 US4499914A (en) | 1983-04-14 | 1983-04-14 | Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0125447A2 EP0125447A2 (en) | 1984-11-21 |
EP0125447A3 EP0125447A3 (en) | 1985-11-21 |
EP0125447B1 true EP0125447B1 (en) | 1988-11-30 |
Family
ID=23926370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84103489A Expired EP0125447B1 (en) | 1983-04-14 | 1984-03-29 | Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup |
Country Status (5)
Country | Link |
---|---|
US (1) | US4499914A (en) |
EP (1) | EP0125447B1 (en) |
JP (1) | JPS59206299A (en) |
CA (1) | CA1216491A (en) |
DE (1) | DE3475381D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3915442A1 (en) * | 1988-05-31 | 1989-12-14 | Normalair Garrett Ltd | RESCUE DEVICE FOR AIRCRAFT CREWS |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4651728A (en) * | 1984-09-28 | 1987-03-24 | The Boeing Company | Breathing system for high altitude aircraft |
NL8501474A (en) * | 1985-05-23 | 1986-12-16 | Dow Chemical Nederland | DIVERSION VALVE. |
DE3601714A1 (en) * | 1986-01-22 | 1987-07-23 | Draegerwerk Ag | DEVICE FOR ENRICHING BREATHING GAS WITH OXYGEN |
GB8624230D0 (en) * | 1986-10-09 | 1987-02-04 | Normalair Garrett Ltd | Aircrew breathing systems |
US5522382A (en) | 1987-06-26 | 1996-06-04 | Rescare Limited | Device and method for treating obstructed breathing having a delay/ramp feature |
US5199424A (en) * | 1987-06-26 | 1993-04-06 | Sullivan Colin E | Device for monitoring breathing during sleep and control of CPAP treatment that is patient controlled |
ES2009156A6 (en) * | 1988-01-11 | 1989-09-01 | Desarrollos Estudios Y Patente | Installation for the supply of oxygen in hospitals and the like. |
US4899740A (en) * | 1989-01-17 | 1990-02-13 | E. D. Bullard Company | Respirator system for use with a hood or face mask |
GB8903433D0 (en) * | 1989-02-15 | 1989-04-05 | Normalair Garrett Ltd | Aircraft aircrew breathing systems |
FR2669227B1 (en) * | 1990-11-16 | 1994-06-17 | Intertechnique Sa | RESPIRATORY GAS SUPPLY SYSTEM FOR AIRCRAFT, BY MEANS OF TESTING. |
NO176078C (en) * | 1991-08-29 | 1995-01-25 | Ottestad Nils T | Pressure control unit for supplying a pressure fluid from alternative supply lines |
EP1149603A3 (en) | 1991-12-20 | 2003-10-22 | Resmed Limited | Ventilator for continuous positive airway pressure breathing (CPAP) |
US5645055A (en) * | 1992-08-12 | 1997-07-08 | Conax Florida Corporation | Oxygen breathing controller |
US5402665A (en) * | 1993-05-11 | 1995-04-04 | Hart; Russell F. | Monitoring gaseous oxygen concentration |
US5590852A (en) * | 1993-08-31 | 1997-01-07 | Alliedsignal Inc. | Apparatus for controlling the partial pressure of oxygen in an aircraft cabin |
US6675797B1 (en) * | 1993-11-05 | 2004-01-13 | Resmed Limited | Determination of patency of the airway |
EP2324765B1 (en) * | 1993-11-05 | 2015-10-07 | ResMed Limited | Control of CPAP treatment |
DE69422900T2 (en) | 1993-12-01 | 2000-06-08 | Resmed Ltd | Continuous positive airway pressure (CPAP) device |
US6237593B1 (en) | 1993-12-03 | 2001-05-29 | Resmed Limited | Estimation of flow and detection of breathing CPAP treatment |
US5542447A (en) * | 1994-01-18 | 1996-08-06 | Normalair-Garrett (Holdings) Limited | Aircrew breathing systems |
AUPN236595A0 (en) * | 1995-04-11 | 1995-05-11 | Rescare Limited | Monitoring of apneic arousals |
AUPN394895A0 (en) | 1995-07-03 | 1995-07-27 | Rescare Limited | Auto-calibration of pressure transducer offset |
AUPN547895A0 (en) | 1995-09-15 | 1995-10-12 | Rescare Limited | Flow estimation and compenstion of flow-induced pressure swings cpap treatment |
JP3845736B2 (en) | 1995-09-18 | 2006-11-15 | レスメッド・リミテッド | Pressure control in CPAP treatment or assisted ventilation |
AUPN616795A0 (en) | 1995-10-23 | 1995-11-16 | Rescare Limited | Ipap duration in bilevel cpap or assisted respiration treatment |
AUPN973596A0 (en) | 1996-05-08 | 1996-05-30 | Resmed Limited | Control of delivery pressure in cpap treatment or assisted respiration |
AUPO163896A0 (en) | 1996-08-14 | 1996-09-05 | Resmed Limited | Determination of respiratory airflow |
AUPO247496A0 (en) | 1996-09-23 | 1996-10-17 | Resmed Limited | Assisted ventilation to match patient respiratory need |
AUPO301796A0 (en) * | 1996-10-16 | 1996-11-07 | Resmed Limited | A vent valve apparatus |
AUPO418696A0 (en) * | 1996-12-12 | 1997-01-16 | Resmed Limited | A substance delivery apparatus |
AUPO511397A0 (en) * | 1997-02-14 | 1997-04-11 | Resmed Limited | An apparatus for varying the flow area of a conduit |
EP1009464A4 (en) | 1997-05-16 | 2006-08-02 | Peter Craig Farrell | Nasal ventilation as a treatment for stroke |
AUPO742297A0 (en) | 1997-06-18 | 1997-07-10 | Resmed Limited | An apparatus for supplying breathable gas |
JP2001514941A (en) * | 1997-08-14 | 2001-09-18 | レスメッド・リミテッド | Apparatus and method for delivering gas suitable for on-demand additional breathing |
JPH1194197A (en) * | 1997-09-19 | 1999-04-09 | Neriki:Kk | Valve device for gas cylinder and pressure reducing valve thereof |
DE29717065U1 (en) | 1997-09-24 | 1998-01-29 | Draeger Aerospace Gmbh | Mobile breathing gas supply unit |
AUPP026997A0 (en) | 1997-11-07 | 1997-12-04 | Resmed Limited | Administration of cpap treatment pressure in presence of apnea |
USD421298S (en) * | 1998-04-23 | 2000-02-29 | Resmed Limited | Flow generator |
US6666226B2 (en) | 2001-12-13 | 2003-12-23 | Carleton Technologies, Inc. | Series/parallel relief valve for use with aircraft gaseous oxygen system |
US7331345B2 (en) * | 2003-01-30 | 2008-02-19 | Survivair Respirators, Llc | Demand regulator protective bellows |
US7341072B2 (en) * | 2003-05-02 | 2008-03-11 | Carleton Technologies, Inc. | Oxygen supply system having a central flow control unit |
US7604019B2 (en) * | 2005-07-22 | 2009-10-20 | B/E Intellectual Property | Electromechanical regulator with primary and backup modes of operation for regulating passenger oxygen |
CA2629947A1 (en) * | 2005-11-09 | 2007-05-18 | Intertechnique | Oxygen supplying circuit for an aicraft crew member |
US8808072B2 (en) * | 2007-03-22 | 2014-08-19 | Honeywell International Inc. | Cabin pressure control system dual valve control and monitoring architecture |
EP2152578B1 (en) * | 2007-05-14 | 2012-08-29 | Airbus Operations GmbH | Oxygen supply system for an aircraft |
US20090188504A1 (en) | 2008-01-25 | 2009-07-30 | Siska Jr William D | Mechanically actuated emergency oxygen delivery system |
GB2474885A (en) * | 2009-10-30 | 2011-05-04 | Honeywell Uk Ltd | A breathing gas system for an aircraft having emergency and auxiliary gas supplies |
US8844537B1 (en) | 2010-10-13 | 2014-09-30 | Michael T. Abramson | System and method for alleviating sleep apnea |
US9089721B1 (en) * | 2012-03-22 | 2015-07-28 | The Boeing Company | Oxygen generating system |
US9856871B2 (en) * | 2015-08-05 | 2018-01-02 | Chung Wei Huang | Bicycle air pump |
US11867591B2 (en) | 2020-11-12 | 2024-01-09 | Lockheed Martin Corporation | Backup oxygen supply bottle pressure measurement and leak test tool |
US11692672B2 (en) | 2020-12-17 | 2023-07-04 | Lockheed Martin Corporation | Pressure relief shipping adapter for a bottle head assembly |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US441648A (en) * | 1890-12-02 | Heat-regulator | ||
US3103927A (en) * | 1959-10-21 | 1963-09-17 | Bendix Corp | Pressure control systems |
GB944931A (en) * | 1960-06-11 | 1963-12-18 | Normalair Ltd | Improvements in or relating to breathing apparatus |
SE332353B (en) * | 1969-09-18 | 1971-02-01 | I Hellqvist | |
US3875957A (en) * | 1972-09-19 | 1975-04-08 | Robertshaw Controls Co | Oxygen-air diluter device |
US4148311A (en) * | 1975-05-06 | 1979-04-10 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Gas mixing apparatus |
US4198213A (en) * | 1978-01-26 | 1980-04-15 | The Garrett Corporation | Self adjusting oxygen enrichment system |
DE2837281A1 (en) * | 1978-08-25 | 1980-03-06 | Linde Ag | Respirable gas supply for aircraft cabins - by adsorptive removal of nitrogen from compressed air |
FR2455765A1 (en) * | 1979-05-02 | 1980-11-28 | Intertechnique Sa | REGULATOR DEVICE FOR SUPPLYING GAS TO A RECEIVING MEMBER |
CA1151050A (en) * | 1979-06-12 | 1983-08-02 | Joseph G.A. Porlier | Breathing mixture controller |
DE3029080A1 (en) * | 1980-07-31 | 1982-02-18 | Linde Ag, 6200 Wiesbaden | METHOD AND DEVICE FOR PROVIDING BREATH GAS |
US4335735A (en) * | 1980-09-22 | 1982-06-22 | The Bendix Corporation | Automatic diluter/demand oxygen regulator adapted for chemical or biological use |
-
1983
- 1983-04-14 US US06/484,964 patent/US4499914A/en not_active Expired - Lifetime
-
1984
- 1984-03-21 CA CA000450107A patent/CA1216491A/en not_active Expired
- 1984-03-29 EP EP84103489A patent/EP0125447B1/en not_active Expired
- 1984-03-29 DE DE8484103489T patent/DE3475381D1/en not_active Expired
- 1984-04-13 JP JP59073119A patent/JPS59206299A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3915442A1 (en) * | 1988-05-31 | 1989-12-14 | Normalair Garrett Ltd | RESCUE DEVICE FOR AIRCRAFT CREWS |
Also Published As
Publication number | Publication date |
---|---|
JPH0436918B2 (en) | 1992-06-17 |
US4499914A (en) | 1985-02-19 |
EP0125447A2 (en) | 1984-11-21 |
EP0125447A3 (en) | 1985-11-21 |
DE3475381D1 (en) | 1989-01-05 |
JPS59206299A (en) | 1984-11-22 |
CA1216491A (en) | 1987-01-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0125447B1 (en) | Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup | |
US3922149A (en) | Oxygen air enrichment method | |
US5071453A (en) | Oxygen concentrator with pressure booster and oxygen concentration monitoring | |
US4870960A (en) | Backup breathing gas supply for an oxygen concentrator system | |
US4919124A (en) | Aircraft aircrew life support systems | |
US4651728A (en) | Breathing system for high altitude aircraft | |
US5165625A (en) | Breathable gas supply installation for aircraft including test means | |
US3524444A (en) | Underwater gas supply system and method of operation | |
US4928682A (en) | Aircraft on-board oxygen generating systems | |
US5460175A (en) | Air-oxygen mixture controllers for breathing demand regulators | |
US5275153A (en) | Demand valve having reaction load means and an insertable trigger element | |
US20090126737A1 (en) | Oxygen supplying circuit for an aircraft crew member | |
EP0050052B1 (en) | Automatic diluter/demand oxygen regulator adapted for use in a toxic environment | |
EP2038014B1 (en) | A respiratory gas supply circuit to feed crew members and passengers of an aircraft with oxygen | |
EP0423496B1 (en) | Oxygen concentrator with pressure booster and oxygen concentration monitoring | |
US5351682A (en) | Breathing demand regulations | |
AU741666B2 (en) | Method of testing an aircraft oxygen supply system | |
US20040216742A1 (en) | Oxygen supply system having a central flow control unit | |
US4130051A (en) | Pneumatic autoschedule cabin pressure controller | |
US4589436A (en) | Oxygen partial pressure controller for a pressure swing adsorption system | |
EP0078644B1 (en) | Breathable gas delivery regulator | |
GB2154464A (en) | Molecular sieve type gas separation systems | |
US2894507A (en) | Reducing and diluting adapter | |
Tedor et al. | Man Rating the B-1B Molecular Sieve Oxygen Generation System |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB |
|
17P | Request for examination filed |
Effective date: 19850307 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB |
|
17Q | First examination report despatched |
Effective date: 19870409 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REF | Corresponds to: |
Ref document number: 3475381 Country of ref document: DE Date of ref document: 19890105 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19971217 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19991130 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20010226 Year of fee payment: 18 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010330 Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020329 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021001 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020329 |